Title of Research Paper and Abstract

Hambal, H.H., Kaharudin, M.S., Mohd-Amir, H.A. and Uraiya, M.A.2000. Effect Of the Feed-Additive ‘Aquagen’ On The Growth of Red Tilapia Cultured in the Rain-fed Water Recirculating System.

Abstract: A trial was conducted to establish the effect of ‘Aquagen’ (a product made up of natural element called Lanthanoid incorporated with amino acids and enzyme) on the growth performance of Red Tilapia. The Rain-fed Water Recirculating Fish Culture System was chosen because of its ability to ascertain the same water quality throughout the four experimental culture tanks each of 25 tons capacity. Fish fry of sized 5.0 – 7.0 centimetres in Total Length or averaging 16 grams Body Weight were stocked at 25 pieces per m³ or 625 pieces per tank. The fish were fed with 2 different diets i.e. commercially formulated pellet ‘treated’ with ‘AQUAGEN’ and without treatment as control. The experiment was run for 140 days with 2 samplings per month. The fortnightly samplings were carried out to monitor the respective body weight and total length of individuals sampled whereas the water quality parameters within the system were checked weekly. Some fish samples were also sent for routine disease diagnosis. Analysis of the results showed that there were no significant different between the water quality in the 4 experimental tanks and the average water quality parameters ranges from 8.0 – 40.0 ppm Alkalinity, 6.5 – 7.5 pH,   26.0 – 27.0 ^oC , 3.5 – 7.0 ppm Oxygen, 0.5 – 12.5 ppm Ammonia, 0.5 – 25.0 ppm Nitrite, 10.0 – 35.0 ppm Nitrate and 20.0 ppm Phosphate. The result also showed that there was no significant difference in body weight and growth rate of the fish fed with Aquagen treated feed and untreated feed.

Nik-Haiha, N.Y. and M. Siti-Azamah.1998.  The Use of Aquatic Plants Garden as a Natural Biological Filter.

Abstract: Combinations of twelve different species of aquatic plants were tested as biological filter and also to identify species that can adapt to the selected area.   Ecology of the selected areas especially to soil and water parameters was studied.  The plants were obtained from farmers and nursed at the center before being planted to the selected sites.  Fertilizer add and pruning the plant monthly.  Monthly samplings were done at three different locations to monitor water quality.  Hach Kit DREL/5 and YSL 53 Oxygen meter were used for water analysis.  Removal of nitrate, phosphate and iron were highest from July to October.  Only emerged and floating plants were adaptable and survived at the site.  The results indicated that aquatic plants are useful as natural biological filter.
Key words:  Aquatic plants, water quality, biological filter, reservoir

Norhanizan, S. Nik-Haiha N.Y. and M. Siti-Azamah, 1998. In-vitro Culture of the Aquatic Plant with special reference to Cryptocoryne lucens.

Abstract: Rapid techniques for clonal multiplication of Cryptocoryne lucens de Witt were developed. Nodal segments excised from matured tuber were cultured on modified Murashige & Skoog (1962) MS media containing different growth regulator concentration which were tested and shoot multiplication were determined after 40 days. The results showed that combination of 0.5 µM BA and 0.5 µM NAA at the moment were the most effective media that could produce 4.4 shoots/explant. Plantlets were then successfully transplanted to the greenhouse and aquarium. Chemical names used: N-(phenylmethyl)-1H-purin-6-amine (BA); 1-naphthaleneacetic acid (NAA).
Keywords. Cryptocoryne lucens, in vitro culture, growth regulators, MS (Murashige & Skoog) media

Abstract: An experiment to culture Miona sp. was carried out in aquarium tanks for 23 days, with 9 treatments of Ajinomoto Liquid Fertilizer (ALF) and one control, having three replicates. The range of the concentration of ALF in the treatments was from 0ppm to 750ppm. Ten individual L^-1 of Miona were inoculated. The highest population density of Miona was obtained in 100ppm concentration of ALF, at 10,150 individuals. L^-1 on the 10^th day.
Key words:  Zooplankton, Cladoceran, Miona sp., production

Pathmasothy, S.2000. Determination of Crude Protein requirement in the diet of Puntius gonionotus for Gonodal recrudescence and vitellogenesis subsequent to induced spawaning.

Abstract. The major component of the female gonad of Puntius gonionotus is protein, 71% followed by lipids, 14% carbohydrates, 9% and minerals about 6%. As the spent females undergo  gonadal recrudescence and vitellogenesis hence all the above nutrients are derived mainly from the feed consumed for there was no significant change in the carcass of the fish during this period.  This study to determine the desirable level of crude protein in the broodstock diet for gonadal development was conducted in tanks utilizing induced spent females of the same age and spawned at the same time. The spent females were randomly selected weighed and stocked at a rate of 6 fish/ tank with four replicates per treatment which were diets with 17, 25 and 32% crude protein and  6% fat. However 6 spent females were sacrificed  immediately  to determine the GSI, HSI, mesentric fat ratio and carcass composition as the control. After 35 days of feeding at ad libitum, the fish  were also sacrificed to determine  weight gain and other parameters.
The results indicate that spent females fed 32% protein diet had the highest GSI of 6.931±2.728 which decreased as the protein content decreased with those fed 25 and 17 % protein diet with 5.250± 2.596 and 3.647±2.253 respectively. The HSI value of those fed 32 and 25 % protein diet were not significantly different with values of 1.877±0.320 and 1.934±0.519 but significantly higher than those fed 17 % protein diet with a value of 1.537±0.388. There was no significant difference in the mesentric fat ratio among  the treatments. However there was significant difference in the  body weight gain among the treatments. Those fed 32, 25 and 17 % protein diet had a 7.75±0.5, 5.21±0.6 and 2.33±0.2 % gain respectively.
These results indicate that for broodstock diet the protein content must be more than 25% with 32%  the advisable level especially for young broodstock for it accommodates   both somatic as well as reproductive growth. In the case of older or larger broodstock where somatic growth may be negligible than for maintenance and reproductive growth alone a 25% crude protein diet maybe sufficient.

Zahari, A., Misri S. and Ramley A.B. 2000. THE FISH FAUNA OF SUNGAI BERIS (Pre-impoundment Survey of the Beris Reservoir).

Abstract: Sungai Beris and its tributaries, Sungai Batang, Sungai Terenas and Charuk Sungkai are in the location of the proposed Beris Reservoir. A pre-impoundment ichthyofauna survey in these rivers revealed the existence of a diversity of fish. Forty four species, from 15 families were caught during the survey. Dominant species were Puntius binotatus, Rasbora sumatrana and Gara   taeniata. Several other rare species, such as Leiocassius lecanthus, Leiocassius poecilopteris, Nemacheilus selangoricus, Balitoropsis bartschi and Homaloptera orthogoniata were also identified. Amongst these, a few are known to be potential aquarium fishes. The abundance of cyprinids (65.8%) was closely related to the habitat profile of the local rivers.
Keywords: Pre-impoundment study, species diversity, rare species

Zulkafli, A.R., Zakaria, I., and Yaakob,A. 2000. Finishing culture system to produce large fish : Tilapia Growth in Lucas Tank. National Fisheries Symposium 31^st October to 2^nd November 2000, Grand BlueWave Hotel, Johor Bahru, Malaysia.

Abstract: Tilapia is set to be an important contributor the freshwater aquaculture production in this country. This investigation presents an alternative method for producing larger Tilapia at higher density in a shorter culture period. The main purpose of this investigation is to fatten Tilapia in a modified Foster-Lucas Tank. The fish were stocked at 15 fish / m³ in 1000 m2 tank and fed on commercially available palletized diets containing 32% crude protein. The fish were fed twice daily (0830h and 1530h) at 1.5% of the body weight. The results of the investigation showed that the fish grew from 272.66"29.60 g to 622.66"145.82 g in 95 days. The fish growth can be explained by a curve : Y=222.5+1518.4/(1+exp(-(x-131.8)/50.2)). A gross yield of 88.1 tons / ha. /95 days was obtained. Daily weight gain (DWG) was calculated at 3.68 g/day. DWG (%) decrease with body size according to the relationship: ì= 66.0+6*exp(-x/108.2). Size variations were evident with greater coefficient of variation of body weight and length at the end of the trial compared to the initial. Results of this trial indicated that the culture system could be developed for use in increasing the fish productions.
Keywords: Tilapia culture, Foster-Lucas Tank, fish growth and production.

[Mission & Objective] [History] [Rationale & Function] [Staff] [Facilities]
[General & Research Activities] [Research Programme] [Collaborative Research]
[Technology Transfer] [Publications] [Annual Report] Consultancy Services (in Bahasa Malaysia)]
[Recent Breakthrough] [Achievements] [The Future] [Back To Main ]